Monochrome hibernated tabs become color upon mouseover
When I hibernate a background tab, it becomes monochrome, which I like! But when I mouseover it, it fades back into color, then fades back to monochrome when my mouse leaves it - but then it becomes color again.
I tried this with pinned tabs as well - with pinned tabs they become color immediately after mouseover without any fade effect. Also, the tabs remain hibernated, it's just the icon that changes.